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is a city in Alameda County, California, United States. The population was estimated to be 82,472 as of January 1, 2009. The climate of the city is mild throughout the year.
As of the census of 2000, there were 79,452 people, 30,642 households, and 19,825 families residing in the city. The population density was 2,336.4/km² (6,355.0/mi²). There were 31,334 housing units at an average density of 921.4/km² (2,387.2/mi²). The racial makeup of the city was 51.29% White, 9.88% Black or African American, 0.77% Native American, 22.96% Asian, 0.86% Pacific Islander, 8.48% from other races, and 5.76% from two or more races. 20.06% of the population were Hispanic.
According to the census bureau's 2006 estimates, there were 90,236 people. The racial makeup of the city was 42.8% White, 11.1% Black or African American, 0.4% Native American, 24.8% Asian, 0.1% Pacific Islander, 17.1% from other races, and 3.1% from two or more races. 26.7% of the population were Hispanic.
There were 30,642 households out of which 28.8% had children under the age of 18 living with them, 47.1% were married couples living together, 12.7% had a female householder with no husband present, and 35.3% were non-families. 28.5% of all households were made up of individuals and 11.6% had someone living alone who was 65 years of age or older. The average household size was 2.57 and the average family size was 3.19.
In the city the population was spread out with 22.2% under the age of 18, 7.8% from 18 to 24, 32.0% from 25 to 44, 22.0% from 45 to 64, and 16.0% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 93.1 males. For every 100 females age 18 and over, there were 89.4 males.
The median income for a household in the city was $51,081, and the median income for a family was $60,266. Males had a median income of $41,157 versus $33,486 for females. The per capita income for the city was $23,895. About 4.5% of families and 6.4% of the population were below the poverty line, including 7.3% of those under age 18 and 6.5% of those age 65 or over.